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Consolidated Statements of Cash Flows - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Operating Activities: |  |
Consolidated net loss | $ (17,282) | $ (101,282)
Adjustments to reconcile consolidated net loss to cash provided by (used in) operating activities: |  |
Depreciation and amortization of intangibles | 30,268 | 47,909
Asset impairments | 24,356 | 29,292
Fair value adjustments | 9,959 |
Gain on sale of assets | (1,580) |
Loss on debt extinguishment |  | 6,517
Inventory valuation | (257) |
Gain on derivative instruments | (14,780) | (555)
Amortization of deferred financing costs | 1,394 | 511
Amortization of debt discounts (premiums) | (230) | 689
Noncash compensation | 2,679 | 2,809
Bad debt expense | 245 | 27
Interest expense added to senior notes | 133 | 1,185
Changes in operating assets and liabilities: |  |
Accounts receivable | 30,571 | (6,698)
Inventories | 19,090 | (2,780)
Prepaid expenses and other assets | 965 | 10,197
Prepaid inventory | 637 | 1,562
Operating leases | (4,751) | (10,161)
Assets held-for-sale | 1,012 |
Liabilities held-for-sale | 9,110 |
Accounts payable and accrued expenses | (19,763) | (2,585)
Net cash provided by (used in) operating activities | 71,776 | (23,363)
Investing Activities: |  |
Proceeds from sale of interests in PAL | 19,896 |
Proceeds from Magic Valley asset sale | 10,000 |
Additions to property and equipment | (6,580) | (3,281)
Net cash provided by (used in) investing activities | 23,316 | (3,281)
Financing Activities: |  |
Proceeds from issuances of common stock and warrants | 75,829 | 3,670
Proceeds from warrant exercises | 5,500 |
Proceeds from CARES Act loans | 9,860 |
Net proceeds (payments) on Kinergy’s line of credit | (45,826) | 21,282
Payments on plant borrowings | (71,536) | (8,000)
Payments on senior notes | (40,249) | (3,748)
Preferred stock dividend payments |  | (946)
Proceeds from CoGen contract amendment |  | 8,036
Debt issuance costs |  | (1,280)
Net cash provided by (used in) financing activities | (66,422) | 19,014
Net increase (decrease) in cash and cash equivalents | 28,670 | (7,630)
Cash and cash equivalents at beginning of period | 18,997 | 26,627
Cash and cash equivalents at end of period | 47,667 | 18,997
Supplemental Information: |  |
Interest paid | 17,469 | 18,763
Income tax refunds | 641 |
Noncash financing and investing activities: |  |
Initial right of use assets and liabilities recorded under ASC 842 |  | 43,753
Issuance of common stock for senior note amendment |  | 3,817
Issuance of warrants for senior note amendment |  | 977
Accrued preferred stock dividends | $ 1,268 | $ 319

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